Hot plate for vulcanizing presses



Nw. 25, 1924. f 3,516,596

J. R. GAMMETER f HOT PLATE FOR VULCANIZING PRESSES Filed April 2.3, 1923 3, l, MME/WMM.

Patent-ed Nov. 2.15, 1924i.

STATES isias'sa PATENT oFFicE- JOHN R. GAmlllllil'lllllf, OF AKRON, OHIO, ASSIGNOR TO THE B. F. GOOIFDRICH COMPANY, OF NEW YORK, N. Y., A. CORPORATION OF yNEWT YORK.

HOT PLATE FOR VULCANQIIZING PRESSES.

application enea Aprii 23, 192'3. semi No. 634,027.

To all whome't may concern:

Be it known that l, JOHN R. GAMMETER, a citizen of the United States, rvesidino` at Akron, in the county of Summit and Sciate of Ohio, have invented a certain new and useful' Hot Plate for Vulcanizing Presses, of which the following is a specification. i This invent-ion relates to the construction of the hot-plate 17 shown in my Patent 1,414,507 of May 2, 1922, embodying a duct formed and arranged in a novel manner in the plate for the passage of the'steam or other heating fluid. p

These plates are commonly made of steel and the usual method of forming the duct heretofore hasbeen to drill the plate from one edge in the' plane thereof with a number of parallel holes, then drill two holes at right angles to the first series of holes near opposite edges of the plate to form connecting passages, then drive in plugs at intervals in staggered fashion into these two connecting holes so as to make a single continuous passage, and finally plug up the ends of all the intermediate holes at the ed of the late, leaving only two termina openings igor connecting the pipes for the intake and discharge of the heating fluid. v

This mode of construction, besides being comparatively expensive, has the disadvantage that it is practically impossible 'to clean scale and sediment from the open portions of the transverse connecting holes owing to the presence of the plugs in the adjacent closed portions and these plugs, unless very accurately fitted, may tend to become dislodged. v It is the object of my present invention to overcome these objections.

0f the accompanying drawings, Fig. 1 is a side elevation showing a two-mold vulcanizing press provided with hot-plates constructed according to my invention.

Fig. 2 is a horizontal section on the line 2-2 of Fig. 1.

ln the drawings, 10 is the base of the press provided with a hydraulic cylinder 11, having a plun er 12 which carries the movable press-p aten 13 at its upper end. 14 isA the upper fixed press-platen or cross-head4 and 15, 15 are the vertical tie-rods connecting the base with the upper platen 14.

16, 16 are a series, in this instance three,

of hot-plates, of which the bottom and top ones may be attached to theI movable and one or both of the front and rear edges of said plate I drill clear through the plate a series of diagonal holes or duct Acourses 19 which meet or run into each other in staggered fashion at apexes in two series.

of common holes 2O -on the respect-ive front and rear edges, and I then tapi out all of the apex holes and insert screw-threaded plugs 21 therein, the result being a continuous zig-zag v fluid paage. The two holes at the beginning and end of this pase sage are likewise tapped for the reception of the screw-threaded ends of .the intake and discharge pipes 22, 23 respectively.

Where more than one of these hot-plates 16 is provided, they are preferably connectp ed in series, as here shown, from to to bottom, with the discharge end of one uct connected through a telescopic pipe 24 with the intake end of the next duct, there lbein a final ldischarge through the pipe 25. tween the hot-plates are shown two vulcanizing molds 26.

By constructing the hot-plates in this fashion I not only reduce the cost of manufacture and attain a simplified construction but also provide a series of straight passages which, upon removal of' the plugs 21, and the connections, allows the insertion of a cleaning tool such as those employed with water-tube boilers for removing scale and sediment from these passages, thereby maintaining the efficiency of the hot-plate and also providin a structure which fully complies with all iler inspection laws to which apparatus of this type 1s often subject.

Variations in detail may, of course, be made within the .scope of my invention.

ll claim:

1. A hot-plate having a ziz-zag fluid passage therein formed of straight courses apexin in a series of apertures at the edge of sai plate, each aperture common to a air of such courses, and means for clos ing said apertures.

2. A hot-plate having a zig-zag fluid passage therein formed of straight courses apexing in two series of apertures at opposite edges of the plate, each aperturecommon tov a pair of such courses, and removable screw plugs forming closures for said apertures.

3. A heating platen ha cross-passages directly communicating wit each other at their ends and tubular connections carried b said p aten and communicating with a p urality of such passages whereby a heating Huid may Ibe circulated` through the passages of the platen. f

4. A steam platen comprising a thin plate of relatively large dimensions substantially rectangular in shape having a series of eros-paags directly communicating with each other and forming a continuous patln and tubular connections carried b platen and communicating with a urality ofl such passages whereby a heating fluid may be circulated through the passages forming the continuous pathof the platen.

5. A steam platen com a thin plate having cross-passages ollowing straight lines; such passages through the platen, and removable plugs closing the ends of said p; pairs of the latter communicating with single outlets closed by said plugs.

In witness whereof I have hereunto set my hand this 9th da of A ril, 1923.

" JOH R. AMMETER.

extending entirely D said. 

